Display screen with an icon



FIG. 1 is a front perspective view of a display screen with an icon, the broken line drawing of a computer system is shown for illustration purposes only and forms no part of the claimed design;

FIG. 2 is a front view of a second embodiment thereof, the broken line drawing of a computer system is shown for illustration purposes only and forms no part of the claimed design;

FIG. 3 is a front view of the first embodiment shown in FIG. 1, on an enlarged scale, the display screen is shown partially for ease of illustration;

FIG. 4 is a front view of a third embodiment thereof, on an enlarged scale, the display screen is shown partially for ease of illustration;

FIG. 5 is a front view of a fourth embodiment thereof, on an enlarged scale, the display screen is shown partially for ease of illustration; and,

FIG. 6 is a front view of a fifth embodiment thereof, on an enlarged scale, the display screen is shown partially for ease of illustration. 

The ornamental design for a display screen with an icon thereon, as shown and described. 